Structure of the Ag/Si(111) surface by scanning tunneling microscopy
- 26 January 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 58 (4) , 369-372
- https://doi.org/10.1103/physrevlett.58.369
Abstract
We present the first real-space images, obtained by scanning tunneling microscopy, which show the ordered atomic structures of the Ag/Si(111) surface for several submonolayer coverages. The (√3 × √3 )R30° surface is shown to be of the honeycomb structure, and the room-temperature coverage is determined to be theta=(2/3). The (1×3) overlayer consists predominantly of rows of Ag atoms separated by two empty rows. At low coverage the surface shows long-range 7×7 order, but patches occur within the 7×7 cells whree Si adatoms are absent.Keywords
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